Cone loud-speaker diaphragm



W. H. MARTIN CONE LOUD SPEAKER DIAPHRAGM May 3 1927.

Filed Feb. 21, 1925 7 INVENTOR [k /llama BY 7 ATTORNEY Paiented May 3, 182'? Mm) STATS umnuwm wimim H. MARTIN,

recite Ami mnreimmire;

Applicetime filee'i Febifiiexy 21, 18215.

This invention relates to dimpiiifiegms Lifer iouci speaking teiephcne receivers and name perticuiaiiy t0 coiiicei diaphmgms 01 such receivers,

It is an established practice in the aria "m censti'uct loud speaking receiver die piiiegms with a conicai scctien and e frusio conicei section which emopemtee with the cmiiczil sectieii in repmducing the smm vibrations. iHGIBtGfOZQ; such a diaphragm has been formed of two we more pieces of paper or other light, eieetic mateiiei, ioine. :Ogtilfi? by suitable means. This ceilsizruciion necessai'iiy inveivcs considerebie cost enei iaber.

It is the abject of eppiicants inveiitien in pmviiic {L11 efficient ceiiiciii me speekei' dim pixie m foi'meci from single piece of mate rial.

The invention Wii be clearly iii'idei'siooii fmm the following detailed description of one desirable emhedimeni; thereof, when the description is read with rcferenee to the accmiipenying drawing Figure 1 of the drawing shame the single pieee eff meteriei cfere it is formed inte the cone mini cane TEE'USUIUH, and Fig. shows in elevation the (iiziphiaigm after formatimii Like 21m IHGYSLiS of reference iii. the We figures 0f the chewing mark corresponding points en the piece of material With reference to the details 01? file drew iiig, the single piece ef paper 01 other light, eiascic materiel is cut ie in Fig. 1--2--3-- i-- -fi- Z- -fi ii lO- ii---i--iS14-15-16i7 end 1819- 20-21. The points 2, 5 6, e, 1e, 13 14, m and 18 and 21 are all eqiiiiiisizin i'i'oin the point 1, am}. the dotted (Fig, 1) straight lilies Q-Zi 6-5 iiii l 'i'fl and i8--2i and (he solid sire it" 3 Ei FS 9-1G, -14, re chords of. e e 1e hose cenr is i, eherde 2-5, 3 9, etc, being banger than the chords Q IO, etc. The "zhercds 2---5, 8-9, lfl iii 'i4--i7, enci i8-i1 form the bases of sectiene i3-3-4 --5, 6 Z-8--9, ifi lfllii i i, 1 r-i5--1i17, and 18-19-20-21, respectiveiy, these sections being, approximateiy, at east, in the form e35 tmpezia, ve 545 ii 6-? 9 8 etc., are 116i radii lines with. ccnt6? 1%. but are cut back eemewiiei: in form gear-teeth edges.

' en the piece 0% meieriei eimwii iii i igu is is be ferined into the diephmgm IdilQWH O]? UHAIEERKQUA, YO A QEQEUEQE the ehepe Shawn.

of meteiriei farms the QOiiiCei por'tieii cf the diaphragm, end time flay he buci: along the co'riefil iinee 61..

farm the ii'usiiro-coeicel nei'iien phlegm. A

The s'tmighi Aimee 5?;-5, iii- 9, eize. i the ready fciding 0i. ihe flaps iiic" the materiel be seii'iewiiai iii 0f Fiffi 1 should prcfereeiy be cut back enoug s0 then whee the flaps ire it i pesitioii to farm the ciivideci cone 1 the peiiiixs 4 and; 'Z, 8 and 11, 12 and L! i will be apart-o This sepeiraiien edges 4--5 rvmi iiiii, 89 2:116; H k-Ii from striking each other during the (m we of the diaphragm and s0 eve s rattling d which Wmiid r mit 'i ce Jam silflidlig.

"cm the e cirewii g i e W 3 i As Wiii be clearly seen ciescr'ipiion and Fig. i of Lil main scctieii of the meteri being enei and not CHCUiQl, dues "mi-(01m true come. As the nuinbez' of s is i3: raised the surface 0f the main pSTiLiOH e1? riie phmgm becomes more nearly ceiiicei simface.

The diaphragm has beei'i dimer nectien with ii iced speakin c is to be undierszoeci that the in'vcii piieebie to many other (iev' es 750i" phonograph i'epi'ec'iucere m 9 ii" thermere eppiiczmvt deee not iimit ticn to the ebuve descriptive but aim .4 invention as ieiiewe:

What is cieimed is:

1. A loud speaking teiepiicne receiver CF3- phi'agm comprising 8, subeientis portion and e divisieci Erusfzc-een said two POElJTiOHS beiag inteew iv .ci 2. A land speaking teiep receiver 1 phmgm cemprisiiig eeeciei' stan'meii cemcei ZZYLCi a p. smeiiei seciieiie goiiitiy formi frusto-conical portion, said main section and said smaller sections being integrally formed.

3. A loud speaking telephone receiver diaphragm comprisinga substantially conical main portion and a plurality of smaller portions, said smaller portions being designed to form a divided cone frustrum and being integrally formed with said substantially c mical portion.

at. A loud, speaking telephone receiver diaphragm comprising a first portion polygonal at its periphery and gradually merg ng into conical l'orm towards its apex and a diuded trustoeonical second portion, said two portions being formed from a single piece of material, said piece of material comprising a main polygonal section forming the first portion and a plurality of smaller sections forming the second portion, the bases of said smaller sections being chords of the ('tl'L'lQ whose center forms the apex of said first portion.

5. A loud speaking telephone receiver diaphragm comprising a first portion polygonal at its periphery and gradually merging into conical form towards its apex and a divided i'rustoronical second portion the diaphragm genomes being formed from a single piece of material.

said piece of material comprising a main polygonal section having alternate longer and shorter sides which are chords of a common center, said main section forming the first portion, and a plurality of smaller sections each in the form of a trapezium having as its base a longer side of said polygonal section, said smaller sections forming the second portion In testimony whereof, I have signed my name to this specification this 18th day of February, 1925.

lilLLlAlvl ll. MARTlN. 

